恩施市龙凤镇土壤镉元素地球化学特征及影响因素分析

Geochemical Characteristics and Influencing Factors of Cadmium in Soil of Longfeng Town,Enshi City

在对恩施市龙凤镇全区进行1∶5万土壤地球化学调查的基础上,依据土地质量地球化学评价规范,以镉元素为评价对象,评价龙凤镇镉元素土壤环境质量地球化学等级,分析研究区镉污染形成的影响因素。成果显示,研究区镉污染程度较高,较严重镉污染土壤面积占比11.83%,镉元素土壤环境质量主要受区内成土母质、土壤类型以及酸碱度的综合影响;研究区属于高镉高硒区,镉和硒元素之间存在正相关性,推测镉和硒元素来源于相同的成土母岩。

Based on the soil geochemical survey of 1∶ 50 000 of Longfeng Town,Enshi City,the geochemical grade of soil environmental quality of the cadmium element was evaluated,and the influencing factors of cadmium pollution were analyzed in Longfeng Town,according to Specification of Land Quality Geochemical Assessment. The results showed that the cadmium pollution in the study area was higher,and the soil area of severe cadmium pollution was 11. 83%,and the soil quality of cadmium was mainly affected by soil parent material,soil type and p H value. The study area was high cadmium and high selenium region,there is a positive correlation between cadmium and selenium. It is speculated that cadmium and selenium elements are derived from the same soil parent rock.